So far the fossil record of the genus Todea consists only of the permineralized rhizome T. tidwellii from the Lower Cretaceous of Vancouver Island, Canada.

References

Jud, Nathan, Gar W. Rothwell, and Ruth A. Stockey (2008). "Todea from the Lower Cretaceous of western North America: implications for the phylogeny, systematics, and evolution of modern Osmundaceae." American Journal of Botany, 95:330-339.

Hennipman, E (1968). A new Todea from New Guinea, with remarks on the generic delimitation of recent Osmundaceae. Blumea 16: 105-108